BMW N62 4.4 Engine Oil Pump Problem and Update

BMW Engine Oil Pump – Here’s one for the record books, it’s actually the subject of a BMW Technical Service Bulletin, but our friends and colleagues in the BMW Tech Groups have not run across it yet, we seem to have been one of the few shops who has seen this in the “wild”. So, we thought we’d document this for the benefit of others. When changing the oil filter on the BMW N62 engine, keep your eyes open for bits and pieces of the engine oil pump check valve. Seems BMW has a problem with this, and part of [...]

By | August 25th, 2011|Case Studies|Comments Off on BMW N62 4.4 Engine Oil Pump Problem and Update

Audi A3 2.0 TFSI Engine – Carbon Deposits

Own a Audi model with the 2.0 TFSI engine? – Read on, we may be able to save you and your car from some real headaches. These engine seem to have developed a chronic problem with carbon deposits on the intake valves, which can lead to a very expensive repair. This carbon build up on the valves is caused by the direct injection, a common issue with engines of this type. It happens because the fuel is not being injected over the valves, this would keep the valves nice and clean. A secondary issue may also be the crankcase ventilation [...]

By | August 24th, 2011|Case Studies|Comments Off on Audi A3 2.0 TFSI Engine – Carbon Deposits

Volvo XC90 – AWD/AOC Drive Coupler Problem

Tech Brief - Buying or own a used Volvo with 70K-120K miles? Make sure the All Wheel Drive System (AWD) is working, in fact, this may be something that you want your servicing shop or dealer to check the next time your Volvo is in for service. Over the past few months we've seen a total of 3 of these cars, all in the 70K-120K mile range, with inactive AWD. We check the AWD system each service, but if you are taking your Volvo to a general repair facility, then you may want to show them this article, unless you [...]

By | August 23rd, 2011|Case Studies|Comments Off on Volvo XC90 – AWD/AOC Drive Coupler Problem

VW Touareg – Four Wheel Brake Service

Audi Q7/Porsche Cayenne/VW Touareg Brake System - The Touareg, and its closely related cousins, the Q7 and Cayenne are massive cars weighing in at well over 2 tons, and need an equally massive brake system. We're always impressed with these engineering marvels, here is a photo essay of the complete brake system and layout for a Touareg we are servicing in the workshop. The front brake rotors are directional, with the cooling fins arranged for each side of the car, the brake calipers have six pistons for additional stopping power, and you'll note a brake pad wear sensor on every [...]

By | August 22nd, 2011|Case Studies|Comments Off on VW Touareg – Four Wheel Brake Service

VW Touareg – Four Wheel Brake Service

Audi Q7/Porsche Cayenne/VW Touareg Brake System - The Touareg, and its closely related cousins, the Q7 and Cayenne are massive cars weighing in at well over 2 tons, and need an equally massive brake system. We're always impressed with these engineering marvels, here is a photo essay of the complete brake system and layout for a Touareg we are servicing in the workshop. The front brake rotors are directional, with the cooling fins arranged for each side of the car, the brake calipers have six pistons for additional stopping power, and you'll note a brake pad wear sensor on every [...]

By | August 22nd, 2011|Case Studies|Comments Off on VW Touareg – Four Wheel Brake Service

Mini Cooper Clutch – When Good Clutches Go Bad

Mini Coopers are wonderful cars, but Mini has a problem with clutches, no two ways about it. The early cars are subject to numerous Technical Service Bulletins on clutch problems and noises. What we've also seen is problems with excessive clutch pedal effort. The problem comes on rather slowly, is often not noticed by the driver, who becomes acclimated to it as he/she is using the clutch every day. Comparing your clutch pedal effort to another Mini is a good test, or stop by and ask us for a courtesy check. The key thing here to catch this BEFORE it [...]

By | August 21st, 2011|Case Studies|Comments Off on Mini Cooper Clutch – When Good Clutches Go Bad

Audi/VW V6 Engines – Excess Crankcase Pressure Caused Oil Leaks

We've noticed in our service facility that the Audi/VW V6 30 valve 2.8 liter engines can develop oil leaks as the car gets older and advanced in miles. The 2.7 engines with the twin turbo can develop a similar condition. We would like to bring to your attention a common issue with the crankcase breather hose system. Many of these cars have a rough service history. We consider 'rough' to be irregular oil changes, use of non-synthetic engine oils, extreme hot or cold climates, a lot of short driving distances where full engine temperature is never reached, and excessive low [...]

By | August 20th, 2011|Case Studies|Comments Off on Audi/VW V6 Engines – Excess Crankcase Pressure Caused Oil Leaks

2008 BMW 335XI – Electric Water Pump Replacement

Most cars, including older BMWs, use a water pump which is driven by a belt on the front of the engine, a tried and proven design, but not one which allows dynamic control. As it has transitioned from the older "M" engine to the new "N" designs, BMW has come up with an interesting twist, an electric engine coolant/water pump. An electric water pump is really a brilliant idea, it offers a higher level of control of the engine operating parameters. The electric pump can be turned on and off as needed to speed up engine warm up time and [...]

By | August 19th, 2011|Case Studies|Comments Off on 2008 BMW 335XI – Electric Water Pump Replacement

Volvo XC70 – Engine Oil Sludge – Low Oil Pressure

This is a problem we see much more on Saabs than Volvos, in fact in the last 7 years I've seen this but 3 times. The photos tell it all on this one, symptoms where engine oil light on at idle and engine oil pressure very low. Sludge deposits were found in both the engine oil pump and pickup screen. The o-ring seals in the pan, a common cause of low pressure on these cars, were intact, looking to have been recently replaced. A previous servicing shop had removed the engine oil pan and cleaned the pickup in an attempt [...]

By | August 18th, 2011|Case Studies|Comments Off on Volvo XC70 – Engine Oil Sludge – Low Oil Pressure

Clogged Engine Oil Pump – Note Sludge

A Properly Cleaned Engine Oil Pan

By | August 17th, 2011|Case Studies|Comments Off on Clogged Engine Oil Pump – Note Sludge